Choosing a power supply for a door access system isn't just about finding a 12V brick. The lock needs steady current, the release delay has to fit your entry sequence, and the unit should fit where you need to mount it. The TA-K80 3A, sold as the 12V 3A Power Supply Control for Door Access Control, addresses these concerns in a compact enclosure, and the listed price is USD 12.69.
Quick verdict: This TA-K80 3A is a 30W, 12V DC, 3A power supply with an adjustable 0-15 second delay and NO/NC wiring support. It accepts AC 110-240V, uses a pluggable green terminal block, and comes with a bilingual manual. For a single electric lock or electromagnetic lock, it covers the basics and gives you a delay adjustment that many fixed-output supplies lack.
Who it suits: Installers who need a clean 12V supply for one access-controlled door will find this unit useful. The small metal enclosure works in tight equipment cabinets, and the adjustable delay helps when you need to tune entry timing after the lock is mounted.
12V 3A Power Supply Control for Door Access Control
The standout is the adjustable delay. You can set the release time between 0 and 15 seconds, which lets you adapt the door behavior to the actual entry flow instead of accepting a preset interval. The NO/NC wiring port is another plus: it allows compatibility with both normally open and normally closed lock circuits, so you can use it with common access controllers. The pluggable terminal block makes wiring easier because you can prepare the connector and then insert it.
The power side is simple and clear: input AC 110-240V, output DC 12V 3A, total 30W. That's enough for one electric lock or electromagnetic lock in a typical setup. The grey, spray-painted metal housing with copper and aluminium internals matches the look of standard industrial power supplies and transformers. Installation is required, so you'll need to mount and wire it according to the manual.
Meaningful trade-offs: The delay range is capped at 15 seconds. If your access sequence needs a longer release period, this unit won't accommodate that. The compact size also means you'll want to plan the mounting location carefully, since there's less room to work inside the enclosure. And because the output is 30W, you should keep the connected load within 12V and 3A; this is not a multi-output distribution supply.
Bottom line: For a 12V door access lock that needs an adjustable release delay and NO/NC wiring, the 12V 3A Power Supply Control gives you the core features for a listed price of USD 12.69. It's a straightforward, no-surprises option in the industrial power supplies and transformers category, and the bilingual manual adds a small convenience for first-time installers. If your circuit fits 12V and 3A, this is a solid choice to build around.
